Method for controlling a projector including a cooling unit insulated from a power-supply unit

Patent metadata

Field	Value
Publication number	US-9176366-B2
Application number	US-201213667508-A
Country	US
Kind code	B2
Filing date	Nov 2, 2012
Priority date	Nov 18, 2011
Publication date	Nov 3, 2015
Grant date	Nov 3, 2015

Abstract

A projector according to an embodiment of the invention can measure the temperature of an object to be cooled accurately with a simple configuration and perform accurate cooling control. The projector includes a power-supply unit, a ballast unit having a ballast control circuit and a photocoupler, and a control unit. The power-supply unit includes a temperature detection element generating temperature information indicating the temperature inside the power-supply unit. The ballast control circuit controls a constant-current control circuit and the like based on the control information transmitted from the control unit via the photocoupler and transmits temperature data based on the temperature information to the control unit via the photocoupler. The control unit includes a projector control circuit performing cooling control on the power-supply unit based on the temperature data.

First claim

What is claimed is:

1. A projector comprising:
a power-supply unit;
a ballast unit connected to and configured to control a discharge lamp, the ballast unit having an insulation transmitting section;
a cooling unit configured to cool the power-supply unit; and
a control unit insulated from the power-supply unit and the ballast unit and configured to control the ballast unit and the cooling unit,
wherein
the power-supply unit includes a temperature information generating…

Assignees

• Seiko Epson Corp

Inventors

• Kimura Keishi
• Shioiri Kenichi

Classifications

• H04N9/3144

  Electricity · mapped topic

• G03B21/006

  Physics · mapped topic

• G03B21/16 Primary

  Physics · mapped topic